#define _CRT_SECURE_NO_WARNINGS 1

#include"Calendar.h"

Date::Date(int year,int month ,int day)
{
	_year = year;
	_month = month;
	_day = day;
}

Date::Date(const Date& d)
{
	_year = d._year;
	_month = d._month;
	_day = d._day;
}

Date::~Date()
{

}

Date& Date::operator = (const Date& d)
{
	_year = d._year;
	_month = d._month;
	_day = d._day;

	return *this;
}

Date& Date::operator += (int day)
{
	if (day < 0)
	{
		day *= -1;
		*this -= day;

		return *this;
	}

	_day += day;

	while (_day > GetMonthDay(_year, _month))
	{
		_day -= GetMonthDay(_year, _month);
		++_month;
		if (_month == 12)
		{
			++_year;
			_month = 1;
		}
	}

	return *this;
}

Date Date::operator + (int day)
{
	Date d(*this);
	d += day;

	return d;
}

Date& Date::operator -= (int day)
{
	if (day < 0)
	{
		day *= -1;
		*this += day;

		return  *this;
	}

	_day -= day;

	while (_day <= 0)
	{
		_day += GetMonthDay(_year,_month);
		if (_month == 0)
		{
			--_year;
			_month = 12;
		}
	}

	return *this;
}